How should I overwinter it?
This year, for the first time ever, I grew a dahlia from seed. It flowered all summer long and it still has several buds that look ready to burst open.
However, I know dahlias are not hardy and as I don't have a green house, I was wondering if anyone has a tried and tested method of making sure it survives without being lifted and doesn't mind sharing here? I live in the SE.